{
  "bibcode": "2004GCN..2636....1B",
  "body": "D. Bersier, J. Rhoads, A. Fruchter (STScI), A. Levan (U. of\nLeicester), M. Albrecht (Bochum) and B. Reipurth (Hawaii) report on\nbehalf of a larger collaboration:\n\nWe have observed the field of GRB 040730 (Gotz et al., GCN 2634) with\nthe Infrared Side Port Imager (ISPI) on the CTIO Blanco-4m telescope,\nstarting 0.11d after the burst.  We obtained several images on Jul 30\nand Jul 31 UT in the J, H, and Ks bands.  The 10' field of view was\ncentered on the GRB position and covering the whole error box (2').\n\nWe used an image subtraction technique to search for any variable object\nin the Ks-band data.  In this passband the foreground extinction is\napproximately 0.4 magnitude. We find no variable object in our first\nnight data. Similarly, the comparison of the first and second night data\nreveal no transient, to a limiting magnitude of approximately Ks=17.6 (5\nsigma).",
  "circularId": 2636,
  "createdOn": 1091463123000,
  "email": "bersier@stsci.edu",
  "subject": "GRB 040730, infrared observations",
  "submitter": "David Bersier at STScI  <bersier@stsci.edu>",
  "eventId": "GRB 040730"
}